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Copyright (C) 2015 The Android Open Source Project

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
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<link rel="import" href="../bower_components/polymer/polymer.html">
<link rel="import" href="../styles/gr-change-list-styles.html">
<link rel="import" href="../behaviors/rest-client-behavior.html">
<link rel="import" href="gr-account-link.html">
<link rel="import" href="gr-change-star.html">
<link rel="import" href="gr-date-formatter.html">

<dom-module id="gr-change-list-item">
  <template>
    <style>
      :host {
        display: flex;
      }
      :host([selected]) {
        background-color: #ebf5fb;
      }
      .cell {
        border-bottom: 1px solid #eee;
        flex-shrink: 0;
        padding: .3em .5em;
      }
      a {
        color: var(--default-text-color);
        text-decoration: none;
      }
      a:hover {
        text-decoration: underline;
      }
      .positionIndicator {
        visibility: hidden;
      }
      :host([selected]) .positionIndicator {
        visibility: visible;
      }
      .u-monospace {
        font-family: var(--monospace-font-family);
      }
      .u-green {
        color: #388E3C;
      }
      .u-red {
        color: #D32F2F;
      }
    </style>
    <style include="gr-change-list-styles"></style>
    <span class="cell keyboard">
      <span class="positionIndicator">&#x25b6;</span>
    </span>
    <span class="cell star" hidden$="[[!showStar]]">
      <gr-change-star change="{{change}}"></gr-change-star>
    </span>
    <a class="cell subject" href$="[[changeURL]]">[[change.subject]]</a>
    <span class="cell status">[[_computeChangeStatusString(change)]]</span>
    <span class="cell owner">
      <gr-account-link account="[[change.owner]]"></gr-account-link>
    </span>
    <a class="cell project" href$="[[_computeProjectURL(change.project)]]">[[change.project]]</a>
    <a class="cell branch" href$="[[_computeProjectBranchURL(change.project, change.branch)]]">[[change.branch]]</a>
    <gr-date-formatter class="cell updated" date-str="[[change.updated]]"></gr-date-formatter>
    <span class="cell size u-monospace">
      <span class="u-green"><span>+</span>[[change.insertions]]</span>,
      <span class="u-red"><span>-</span>[[change.deletions]]</span>
    </span>
    <template is="dom-repeat" items="[[labelNames]]" as="labelName">
      <span title$="[[_computeLabelTitle(change, labelName)]]"
          class$="[[_computeLabelClass(change, labelName)]]">[[_computeLabelValue(change, labelName)]]</span>
    </template>
  </template>
  <script>
  (function() {
    'use strict';

    Polymer({
      is: 'gr-change-list-item',

      properties: {
        selected: {
          type: Boolean,
          reflectToAttribute: true,
        },
        labelNames: {
          type: Array,
        },
        change: Object,
        changeURL: {
          type: String,
          computed: '_computeChangeURL(change._number)',
        },
        showStar: {
          type: Boolean,
          value: false,
        },
      },

      behaviors: [ Gerrit.RESTClientBehavior ],

      _computeChangeURL: function(changeNum) {
        if (!changeNum) { return ''; }
        return '/c/' + changeNum + '/';
      },

      _computeChangeStatusString: function(change) {
        if (change.mergeable != null && change.mergeable == false) {
          return 'Merge Conflict';
        }
        if (change.status == this.ChangeStatus.MERGED) {
          return 'Merged';
        }
        if (change.status == this.ChangeStatus.DRAFT) {
          return 'Draft';
        }
        if (change.status == this.ChangeStatus.ABANDONED) {
          return 'Abandoned';
        }
        return '';
      },

      _computeLabelTitle: function(change, labelName) {
        var label = change.labels[labelName];
        if (!label) { return labelName; }
        var significantLabel = label.rejected || label.approved
            || label.disliked || label.recommended;
        if (significantLabel && significantLabel.name) {
          return labelName + '\nby ' + significantLabel.name;
        }
        return labelName;
      },

      _computeLabelClass: function(change, labelName) {
        var label = change.labels[labelName];
        // Mimic a Set.
        var classes = {
          'cell': true,
          'label': true,
        };
        if (label) {
          if (label.approved) {
            classes['u-green'] = true;
          }
          if (label.value == 1) {
            classes['u-monospace'] = true;
            classes['u-green'] = true;
          } else if (label.value == -1) {
            classes['u-monospace'] = true;
            classes['u-red'] = true;
          }
          if (label.rejected) {
            classes['u-red'] = true;
          }
        }
        return Object.keys(classes).sort().join(' ');
      },

      _computeLabelValue: function(change, labelName) {
        var label = change.labels[labelName];
        if (!label) { return ''; }
        if (label.approved) {
          return '✓';
        }
        if (label.rejected) {
          return '✕';
        }
        if (label.value > 0) {
          return '+' + label.value;
        }
        if (label.value < 0) {
          return label.value;
        }
        return '';
      },

      _computeProjectURL: function(project) {
        return '/projects/' + project + ',dashboards/default';
      },

      _computeProjectBranchURL: function(project, branch) {
        return '/q/status:open+project:' + project + '+branch:' + branch;
      },

    });
  })();
  </script>
</dom-module>